Cell Signaling Technology

Product Pathways - Cytoskeletal Signaling

Phospho-Stathmin (Ser38) Antibody #3426

Applications Reactivity Sensitivity MW (kDa) Source
W H M R (Mk) Endogenous 19, 20 Rabbit

Applications Key:  W=Western Blotting
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

Phospho-Stathmin (Ser38) Antibody detects endogenous levels of stathmin protein only when phosphorylated at Ser38.

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser38 of human stathmin. Antibodies are purified using protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from HT-29 cells, untreated or treated with nocodazole for 16 hours at 100 ng/mL and unblocked (left), blocked with phospho-stathmin (Ser38) peptide (middle) or phospho-stathmin (Ser16) peptide (right), using Phospho-Stathmin (Ser38) Antibody.

Background

Stathmin is a ubiquitously expressed microtubule destabilizing phosphoprotein that is upregulated in a number of cancers. The amino terminus of the protein contains multiple phosphorylation sites and is involved in the promotion of tubulin filament depolymerization. Phosphorylation at these sites inactivates the protein and stabilizes microtubules. Ser16 phosphorylation by CaM kinases II and IV (1,2) increases during G2/M-phase and is involved in mitotic spindle regulation (3,4). Ser38 is a target for cdc2 kinase (5) and TNF-induced cell death gives rise to reactive oxygen intermediates leading to hyperphosphorylation of stathmin (6). EGF receptor activation of Rac and cdc42 also increases phosphorylation of stathmin on Ser16 and Ser38 (7). Other closely related family members are neuronally expressed and include SCG10, SCLIP, RB3 and its splice variants RB3' and RB3''. Stathmin and SCG10 have been shown to play roles in neuronal-like development in PC12 cells (8).

  1. Marklund, U. et al. (1994) Eur. J. Biochem. 225, 53-60.
  2. le Gouvello, S. et al. (1998) J. Immunol. 161, 1113-1133.
  3. Mistry, S.J. and Atweh, G.F. (2001) J. Biol. Chem. 276, 31209-31215.
  4. Gavet, O. et al. (1998) J. Cell Sci. 111, 3333-3346.
  5. Luo, X. N. et al. (1994) J. Biol. Chem. 269, 10312-10318.
  6. Vancompernolle, K. et al. (2000) J. Biol. Chem. 275, 33876-33882.
  7. Daub, H. et al. (2001) J. Biol. Chem. 276, 1677-1680.
  8. Di Paolo, G. et al. (1996) J. Cell. Biol. 133, 1383-1390.

Application References

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For Research Use Only. Not For Use In Diagnostic Procedures.

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